Coupon Chief is dedicated to the notion that you should never pay full price for anything online -- well, virtually never, anyway.
The site holds a list of all active online coupons and store discounts for all the big retailers, and a number of smaller ones as well. While this isn't a grocery store coupon place, Coupon Chief does offer for suggestions for saving money on groceries with the site as well.
And, you can make some money with Coupon Chief too.
With their Pays 2 Share program, you can make money just for building the site's database of offers -- 2% of the sales generated from the coupons and codes you upload to the site.